The Redox Functions of Metallodendrimers

Abstract

This mini-review article focuses on metallodendrimers containing redox-robust systems that are attached to branches at the dendrimer periphery, and specifically on the properties, functions and applications of these nano-materials. The mini-review is illustrated essentially with the dendrimers containing metal-sandwich termini such as ferrocenes, cobaltocenes and mixed-sandwich complexes of the [FeCp(g 6 -arene)] family that have been developed in the author's laboratory. Synthetic aspects have been developed and reviewed elsewhere, and here emphasis is placed on stoichiometric and catalytic electron-transfer processes involving redox recognition, redox sensing, redox catalysis and molecular materials aspects. Finally uses of redox metallocenes and metallocene-containing macromolecules as components of batteries are briefly discussed.

Electrochemical Anion Sensing: Supramolecular Approaches

“…Dendrimers have found numerous applications in a myriad of fields including catalysis, medicine, imaging, and sensing. − In 1997, Astruc and co-workers reported the first use of Fc-amide functionalized dendrimers 69 - n for voltammetric anion sensing (Figure ). The authors demonstrated that the cathodic shift of these dendrimers in the presence of H 2 PO 4 – , HSO 4 – , Cl – , and NO 3 – was strongly dependent on the number of dendrimer branches, with a significantly increased response observed on increasing the number of branches from 1 to 3, 9, and 18, attributed to cooperative effects.…”

Redox-Active Metallacarborane-Decorated Octasilsesquioxanes. Electrochemical and Thermal Properties

“…Metallodendrimers are metal-containing macromolecules that have attracted an increased interest in the development of nanometer-scale materials . The incorporation of redox-active units into dendritic structures leads to a wide range of applications such as sensors, catalysts, biomedical materials, and multielectron storage devices, , among others.…”

Energy Transfer in Dendritic Systems Having Pyrene Peripheral Groups as Donors and Different Acceptor Groups

“…It is of interest to include metal ions in the structure of dendrimers in order to obtain complex molecules combining the properties of both entities; the structural ordered properties from the dendritic shell and the redox properties from metal ions [95,96]. In the literature, many examples of metal ions incorporated in dendrimers have been reported with different applications, such as drug carrier, catalysts, and enzyme mimics [97,98].…”